Well, here I go! I just found this 'letter to the editor' by Helen Fielding herself in which she explicitly identifies Bridget Jones with post-feminism.
Bridget is not just on a desperate quest to settle down. Like all self-respecting modern women she is struggling to balance her post-feminist independence and economic power with the human, not just female, need to love and be loved.Whether one approves of Fielding's position is a matter of personal judgement.
I came across this article on Bridget Jones' Diary (only the film version, alas) and the post-feminist question:
Bridget Jones. Icon of post-feminist regression and celebration of marriage uber alles? Au contraire.
Neither role model nor nemesis, Bridget Jones is the epitome of the liberated woman - she can match macho in drink, smoke and swearing; she will stand up to anyone; and she takes both reputable career and sexual freedom for granted.